A euphemism used by 90's Australian primary school children to refer to anal intercourse, usually with negative connotations.
Boy 1: oi where's Ricky? he's missed school for weeks.
Boy 2: nah yeah I heard he got a bumjacking by the principal for stealing deano's tuckshop money, apparently Rob from 6A saw him in a wheelchair on the weekend.
the act of stealing Halloween candy from children while they are trick-or-treating.
Origin: SNL Weekend update Oct. 15, 2011. Rap star Drake and SNL member Jay Pharoah pose as "Teens Dressed as Werewolves" and do a rap song about 'bag jacking'
Me and my friends tried to go bag jacking this Halloween, but all of the kids went out with their parents.
Barmacking is when a person simps hard for a girl and spends around 3k or more on her. Barmacking can also be used when one guy is known for simping multiple women at once and buying them things.